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International Building Code – Structural S1-07/08

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International Building Code – Structural S1-07/08 INTERNATIONAL BUILDING CODE – STRUCTURAL S1-07/08 1502.1 Proposed Change as Submitted: Proponent: Mike Ennis, SPRI, Inc. Revise as follows: 1502.1 General. The following words and terms shall, for the purposes of this chapter and as used elsewhere in this code, have the meanings shown herein. AGGREGATE (Supp). In roofing, crushed stone, crushed slag or water-worn gravel used for surfacing for roof coverings as defined in ASTM D 1863. Reason: This code change proposal clarifies the definition of aggregate, tying it into a current IBC reference standard: ASTM D1863–03 Specification for Mineral Aggregate Used on Built-up Roofs. Cost Impact: The code change proposal will not increase the cost of construction. Committee Action: Disapproved Committee Reason: The proposal would create a conflict between ASTM D448 and SPRI RP4 standards. Also under ASTM D 1863 ninety percent of aggregate would be finer than three-quarters on an inch. Assembly Action: None Individual Consideration Agenda This item is on the agenda for individual consideration because a public comment was submitted. Public Comment: Mike Ennis, Single Ply Roofing Industry (SPRI), requests Approval as Submitted. Commenter=s Reason: This proposed Code Change will clarify the definition of aggregate used in roofing applications. The proposal is to include ASTM D1863 Specification for Mineral Aggregate Used on Built-up Roofs, in the definition. Extensive testing and field experience has demonstrated the need to subject aggregate used as a surfacing for built-up roofing assemblies and ballast stones used to hold the roof system in place to different requirements to mitigate the potential for blow-off. This modification will provide the necessary clarification so that the proper requirements can be implemented in the Code. Final Action: AS AM AMPC D S3-07/08 1502.1 Proposed Change as Submitted: Proponent: Mark S. Graham, National Roofing Contractors Association, representing Technical Operations Committee of the National Roofing Contractors Association Add new definitions as follows: SECTION 1502 DEFINITIONS LANDSCAPED ROOF: See “Roof garden”. 2008 ICC FINAL ACTION AGENDA 915 ROOF GARDEN: A roof area of plantings or landscaping installed above a waterproofed substrate at any building level that is separated from the ground beneath by a man-made structure. Reason: This proposed code change is intended to clarify the intent of the Code by adding definitions for landscaped roofs and roof gardens. The two terms are currently used in Sec. 1507.16 (FS210-06/07), Sec. 1607.11.2.2 and Sec. 1607.11.2.3. The specific definition for the term used here is taken from the National Roofing Contractors Association’s (NRCA’s) The NRCA Green Roof Systems Manual— 2007 Edition. Cost Impact: The code change proposal will not increase the cost of construction. Committee Action: Disapproved Committee Reason: The proposal could lead to confusion over the application of roof live load criteria. The proposed definitions of landscaped roofs and roof garden may be necessary, but this potential confusion needs to be resolved. Assembly Action: None Individual Consideration Agenda This item is on the agenda for individual consideration because a public comment was submitted. Public Comment: Mark Graham, National Roofing Contractors Association (NRCA), Technical Operations Committee of the National Roofing Contractors Association, requests Approval as Modified by this Public Comment. Replace proposal as follows: SECTION 1502 DEFINITIONS ROOF GARDEN: A roof area of plantings or landscaping installed above a waterproofed substrate over a roof deck that is designed for assembly purposes. LANDSCAPED ROOF: A roof area of plantings or landscaping installed above a waterproofed substrate over a roof deck. Commenter=s Reason: The proposed modification is intended to clarify the intent of the Code by adding specific definitions for the terms “landscaped roof” and “roof garden”. The two terms are currently used in Sec. 1507.16 (2007)—Roof gardens and landscaped roofs without specific definitions. The definitions provided here are based upon comments received at the Palm Springs public hearing. Final Action: AS AM AMPC D S5-07/08, Part I 1503.6 (New), Figure 1503.6 (New), 1503.6.1 (New), 1503.6.2 (New), 1507.2.6 (New), 1507.3.6 (New), 1507.4.4 (New), 1507.5.5 (New), 1507.7.6 (New), 1507.8.7 (New), 1507.9.8 (New), 1510.3; NOTE: PART II DID NOT RECEIVE A PUBLIC COMMENT AND IS ON THE CONSENT AGENDA. PART II IS REPRODUCED FOR INFORMATIONAL PURPOSES ONLY FOLLOWING ALL OF PART I. Proposed Change as Submitted: Proponent: Wanda D. Edwards, Institute for Business and Home Safety PART I – IBC STRUCTURAL 1. Add new text as follows: 1503.6 Hail exposure. Hail exposure, as specified in Sections 1503.6.1 and 1503.6.2, shall be determined using Figure 1503.6. 916 2008 ICC FINAL ACTION AGENDA 1503.6.1 Moderate hail exposure. One or more hail days with hail diameters greater than 1.5 in (38 mm) in a twenty (20) year period. 1503.6.2 Severe hail exposure. One or more hail days with hail diameters greater than or equal to 2.0 in (50 mm) in a twenty (20) year period. FIGURE 1503.6 HAIL EXPOSURE 1507.2.6 Asphalt shingles subject to severe hail exposure. Asphalt shingles used in regions where hail exposure is Severe, as determined in Section 1503.6, shall comply with this Section. Asphalt shingles used in regions where hail exposure is Severe shall be tested, classified, and labeled as Class 4 in accordance with UL 2218-02. 1507.3.6 Clay or concrete tile subject to severe hail exposure. Clay or concrete tile used on roofs in regions where hail exposure is Severe, as determined in Section 1503.6, shall comply with this Section. Clay or concrete tile used in regions where hail exposure is Severe shall be tested, classified, and labeled as Class 4 in accordance with FM 4473-05. 1507.4.4 Metal roof panels subject to severe hail exposure. Metal roof panels used in regions where hail exposure is Severe, as determined in Section 1503.6, shall comply with this Section. Metal roof panels used in regions where hail exposure is Severe shall be tested, classified, and labeled as Class 4 in accordance with UL 2218-02. 1507.5.5 Metal roof shingles subject to severe hail exposure. Metal roof shingles used in regions where hail exposure is Severe, as determined in Section 1503.6, shall comply with this Section. Metal roof shingles used in regions where hail exposure is Severe shall be tested, classified, and labeled as Class 4 in accordance with UL 2218-02. 1507.7.6 Slate shingles subject to severe hail exposure. Slate shingles used in regions where hail exposure is Severe, as determined in Section 1503.6, shall comply with this Section. Slate shingles used in regions where hail exposure is Severe shall be tested, classified, and labeled as Class 4 in accordance with FM 4473-05. 2008 ICC FINAL ACTION AGENDA 917 1507.8.7 Wood shingles subject to severe hail exposure. Wood shingles used in regions where hail exposure is Severe, as determined in Section 1503.6, shall comply with this Section. Wood shingles used in regions where hail exposure is Severe shall be tested, classified, and labeled as Class 4 in accordance with UL 2218-02. 1507.9.8 Wood shakes subject to Severe hail exposure. Wood shakes used in regions where hail exposure is Severe, as determined in Section 1503.6, shall comply with this Section. Wood shakes used in regions where hail exposure is Severe shall be tested, classified, and labeled as Class 4 in accordance with UL 2218-02. Add standards to Chapter 35 as follows: Underwriters Laboratories UL 2218-02 Standard for Impact Resistance of Prepared Roof Covering Materials Factory Mutual FM 4473-05 Specification Test Standard for Impact Resistance Testing of Rigid Roofing Materials by Impacting With Freezer Balls 2. Revise as follows: 1510.3 (Supp) Recovering versus replacement. New roof coverings shall not be installed without first removing all existing layers of roof coverings down to the roof deck where any of the following conditions occur: 1. Where the existing roof or roof covering is water soaked or has deteriorated to the point that the existing roof or roof covering is not adequate as a base for additional roofing. 2. Where the existing roof covering is wood shake, slate, clay, concrete cement or asbestos-cement concrete tile. 3. Where the existing roof has two or more applications of any type of roof covering. 4. For asphalt shingle roofs, metal roof panels, and metal roof shingles, when the building is located in an area subject to moderate or severe hail exposure according to Figure 1503.6 unless the roof covering has been successfully tested as required in Sections 1507.2.6, 1507.4.4, and 1507.5.5 for installation over an existing roof covering. Exceptions: 1. Complete and separate roofing systems, such as standing-seam metal roof systems, that are designed to transmit the roof loads directly to the building=s structural system and that do not rely on existing roofs and roof coverings for support, shall not require the removal of existing roof coverings. 2. Metal panel, metal shingle and concrete and clay tile roof coverings shall be permitted to be installed over existing wood shake roofs when applied in accordance with Section 1510.4. 3. The application of a new protective coating over an existing spray polyurethane foam roofing system shall be permitted without tear-off of existing roof coverings. Reason: (IBC) Each year the United States experience 3,000 hail storms. Damages from these storms can run in the billions. This code change proposes to include in the Building Code a map showing moderate and severe hail prone areas.
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